NDA (National Defense Academy) Mathematics: Questions 246 - 253 of 384

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Question number: 246

» Algebra » Arithmetic Progression

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Appeared in Year: 2012

MCQ▾

Question

The geometric mean and harmonic mean of two non-negative observations are and respectively. Then what is the arithmetic mean of the observation equal to?

Choices

Choice (4)Response

a.

4

b.

25

c.

12.5

d.

9

Question number: 247

» Statistics and Probability » Measures of Central Tendency » Mode

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Appeared in Year: 2012

MCQ▾

Question

What is the mode for the data 20,20,20,21,21,21,21,2122,22,22,22,22,22,22,23,23,23,23,24,24,25?

Choices

Choice (4)Response

a.

7

b.

21

c.

25

d.

22

Question number: 248

» Matrices and Determinants » Adjoint and Inverse of a Square Matrix

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MCQ▾

Question

If and then what is equal to?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 249

» Algebra » Quadratic Equations with Real Coefficients

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Appeared in Year: 2012

MCQ▾

Question

What is the sum of the squares of the roots of the equation

Choices

Choice (4)Response

a.

270

b.

422

c.

327

d.

424

Question number: 250

» Algebra » Logarithms and Their Applications

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MCQ▾

Question

What is the value of

Choices

Choice (4)Response

a.

3

b.

2

c.

7

d.

1

Question number: 251

» Trigonometry » Angles and Their Measures in Degrees and in Radians

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MCQ▾

Question

What is the angle subtended by pole at a distance on the ground in sexagesimal measure?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 252

» Analytical Geometry of Two and Three Dimensions » Direction Cosines and Direction Ratios

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Appeared in Year: 2012

MCQ▾

Question

What is the cosine of angle between the planes and

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question number: 253

» Statistics and Probability » Definition of Probability

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MCQ▾

Question

What is the number of ways that boys and girls can be seated so that boys and girls alternate?

Choices

Choice (4)Response

a.

120

b.

14,400

c.

12

d.

72

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